v20 i/o dies under own power HELP!!!

B

breastman569

Member
well we took the boat out yesterday and had a great 2hours and for some reason it started to do exactly what its was doing 10years ago. the boat will start fine in neutral, but as soon as you put it into drive or put a load on the engine it will stall out. has anyone had this problem before?
 
Does it do it while shifting? Or is it after it shifts? Have you tried to bypass the shift interrupt switch yet to see if that is it?
 
Go back to your shift linkage and look for a small switch with 2 wires connected to it. DIsconnect one of those wires and see if it still dies going into gear. Your shift linkage may just be out of adjustment or your shift cable could be bad. Also be prepared to shut the engine off to get it back out of gear. Without the shift interrupt switch connected it will be a BEAR to get out of gear if you've never done one like that before.
 
Make sure the electric choke is working properly. I recenlty had a similar problem, albeit it was running a little rough in neutral, it would die when going in gear. Take off the flame arester and make sure it is not being choked. I had to run with a set of pliers stuck in carb to keep the choke open to get home one time.
 
to get it home i had to keep it in neutral and have my buddy manually run the throttle as i put it into gear once i did that it ran fine other than the carb being loaded with fuel and had to clear out. that is why im leaning more toward a carb, float, power valve or something like that. what do you think. i will for sure check the shift interrupter. thanks for all the help!!!!
 
THEFERMANATOR said:
Go back to your shift linkage and look for a small switch with 2 wires connected to it. DIsconnect one of those wires and see if it still dies going into gear. Your shift linkage may just be out of adjustment or your shift cable could be bad. Also be prepared to shut the engine off to get it back out of gear. Without the shift interrupt switch connected it will be a BEAR to get out of gear if you've never done one like that before.
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i have a '79 volvo/penta 305 with a 280, im not aware of any electrical behind the throttle other than the tilt. would this also be the neutral safety switch? if i do have a shift interrupter where would it be located?
 
Look down the carb throat while someone pushes the throttle forward and see if its dumping gas. What model year and what engine is it? Nevermind about the motor question,I don't type very fast.
 
Since you have a VOLVO, you probably don't have a shift interrupter switch. That is pretty much a MERCRUISER thing as VOLVO used mostly cone clutches that didn't need em. What carb does it have on it? When was the last time it was gone through?
 
My I/O Volvo has a shift interrupter and it is connected right behind where the throttle cable connects to the carb, mine did somewhat of the same thing. It is about 1" sq box and what mine was doing as I put it in gear the box would open up and not make connection. I tie wrapped it together and it is still working fine.
 
THEFERMANATOR said:
Since you have a VOLVO, you probably don't have a shift interrupter switch. That is pretty much a MERCRUISER thing as VOLVO used mostly cone clutches that didn't need em. What carb does it have on it? When was the last time it was gone through?
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i have a quadrajet carb and it was just rebuilt 2 months ago it was the first thing we did.
 
After the interuuprter switch---things on carb to check--even though just gone thru--crap happens---float level(should have a brass float for sure-if not --put on in) Accelerator pump( not sticking and not returning to the up position., and main rods to make sure they have not come lose.
 
Maybe a bad guess, but what about water intrusion into the pistons and burning them away. I know my Evinrude is an outboard, but that is what happened to mine. Same scenario, runs good on land but put in water on load and sputters out. Turns out I lost 1,3 & 6.
 
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